Suppose a computer manufacturer can build circuit boards acc

Suppose a computer manufacturer can build circuit boards according to the following process: 12 resistors + 20 insulators + 8 memory chips rightarrow 4 circuit boards. How many circuit boards could you make using 30 insulators, assuming you have enough of all the other parts? 6 20 4 10 none of the above

Solution

Answer: 6

Since all the circuit boards are equal in characteristics they should contain equal sub divided parts.

20 insulators required for 4 circuit boards

indicates 30 insulators can make 6 circuit boards

1 circuit board = (20/4) = 5 insulators
30 insulators = (30/5) = 6 circuit boards